Hi Phil,
On Wed, Apr 6, 2022 at 4:40 PM Phil Chang phil.chang@mediatek.com wrote:
On Fri, Feb 25, 2022 at 4:20 PM Phil Chang phil.chang@mediatek.com wrote:
In some low-memory devices, it's hard to aquire large-orders pages, this patch allowed user using scatter pages to register shm.
Signed-off-by: Phil Chang phil.chang@mediatek.com Reviewed-by: Sumit Garg sumit.garg@linaro.org
drivers/tee/optee/call.c | 2 +- drivers/tee/tee_shm.c | 35 +++++++++++++++++++++++++---------- 2 files changed, 26 insertions(+), 11 deletions(-)
Looks good to me. Unfortunately this is too late for the coming merge window, so it's going to be the one after that. Meanwhile it will be in linux-next.
Thanks, Jens
Hi Jens thanks for your review, did I push again wile merge window open ? Or just wait ?
Just wait. You should be able to see it in linux-next for now.
Cheers, Jens
Thanks
diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index bd49ec934060..2082e632adff 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c @@ -362,7 +362,7 @@ int optee_check_mem_type(unsigned long start, size_t num_pages) * Allow kernel address to register with OP-TEE as kernel * pages are configured as normal memory only. */
if (virt_addr_valid(start))
if (virt_addr_valid(start) || is_vmalloc_addr((void *)start)) return 0; mmap_read_lock(mm);diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index f31e29e8f1ca..836872467dc6 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -23,21 +23,36 @@ static void shm_put_kernel_pages(struct page **pages, size_t page_count) static int shm_get_kernel_pages(unsigned long start, size_t page_count, struct page **pages) {
struct kvec *kiov; size_t n; int rc;kiov = kcalloc(page_count, sizeof(*kiov), GFP_KERNEL);if (!kiov)return -ENOMEM;
if (is_vmalloc_addr((void *)start)) {struct page *page;
for (n = 0; n < page_count; n++) {kiov[n].iov_base = (void *)(start + n * PAGE_SIZE);kiov[n].iov_len = PAGE_SIZE;}
for (n = 0; n < page_count; n++) {page = vmalloc_to_page((void *)(start +PAGE_SIZE * n));
if (!page)return -ENOMEM;get_page(page);pages[n] = page;}rc = page_count;} else {struct kvec *kiov;kiov = kcalloc(page_count, sizeof(*kiov), GFP_KERNEL);if (!kiov)return -ENOMEM;
rc = get_kernel_pages(kiov, page_count, 0, pages);kfree(kiov);
for (n = 0; n < page_count; n++) {kiov[n].iov_base = (void *)(start + n *PAGE_SIZE);
kiov[n].iov_len = PAGE_SIZE;}rc = get_kernel_pages(kiov, page_count, 0, pages);kfree(kiov);} return rc;}
2.25.1